The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1987
Filed:
May. 16, 1986
Bernhard Huber, Uberlingen, DE;
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
The present invention is directed to a gas control device for controlling the fuel gas and the oxidizing agent supplied to a burner in an atomic absorption spectrometer. The device includes a pressure controller and a downstream flowmeter, connected to the aforesaid pressure controller in each of the device's supply conduits to an atomizer, oxidizing agent port and full gas port of the burner. Each flowmeter employed in the preferred embodiment of the invention is comprised of a turbine wheel which is exposed to the gas flowing through the flowmeter. By the rotation of the turbine wheel output, signals are generated depending on the angular rate thereof and thus as a function of the gas flow rate. These output signals are input into a control unit and a set of servomotors, each associated with one of said pressure controllers, are reproducibly adjusted under the control of said control unit, even under unstable pressure conditions, to selected gas flow rates.